Insertion-Ligation Reconstitution of Transmembrane Proteins for Functional Interfaces in Synthetic Cells

Area of Science:

• Biochemistry
• Synthetic Biology
• Materials Science

Background:

• Transmembrane proteins are crucial for cell communication, but their insertion into synthetic cells is challenging.
• Synthetic cells offer controllable platforms for various applications but lack native protein insertion machinery.

Purpose of the Study:

• To develop a method for reconstituting functional transmembrane proteins in synthetic cells.
• To enable synthetic cells to perform extracellular-to-intracellular signal transduction.

Main Methods:

• A two-step chemical method termed "insertion-ligation" was developed.
• This method chemically inserts single-pass transmembrane proteins into synthetic cell membranes.

Main Results:

• Functional transmembrane protein reconstitution was achieved in synthetic cells.
• Synthetic cell-synthetic cell interfaces were created, transducing adhesion signals intracellularly.
• Transmembrane complexes capable of signal transduction across the bilayer were formed.

Conclusions:

• The insertion-ligation method overcomes limitations in synthetic cell engineering.
• This strategy allows broad access to diverse transmembrane proteins for synthetic cell applications.
• It expands the potential of synthetic cells in biomedicine, sensing, and computing.